public class CouponDisplayView extends LinearLayout {

 private Paint mPaint;
 /**
  * 圆间距
  */
 private float gap = 8;
 /**
  * 半径
  */
 private float radius = 10;
 /**
  * 圆数量
  */
 private int circleNum;

 private float remain;


 public CouponDisplayView(Context context) {
  super(context);
 }

 public CouponDisplayView(Context context, AttributeSet attrs) {
  super(context, attrs);
  mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
  mPaint.setDither(true);
  mPaint.setColor(Color.WHITE);
  mPaint.setStyle(Paint.Style.FILL);
 }

 @Override
 protected void onSizeChanged(int w, int h, int oldw, int oldh) {
  super.onSizeChanged(w, h, oldw, oldh);
  if (remain==0){
   remain = (int)(w-gap)%(2*radius+gap);
  }
  circleNum = (int) ((w-gap)/(2*radius+gap));
 }


 public CouponDisplayView(Context context, AttributeSet attrs, int defStyleAttr) {
  super(context, attrs, defStyleAttr);
 }

 @Override
 protected void onDraw(Canvas canvas) {
  super.onDraw(canvas);
  for (int i=0;i<circleNum;i++){
   float x = gap+radius+remain/2+((gap+radius*2)*i);
   canvas.drawCircle(x,0,radius,mPaint);
   canvas.drawCircle(x,getHeight(),radius,mPaint);
  }
 }

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:paddingLeft="16dp"
 android:paddingRight="16dp"
 android:paddingTop="20dp">
 <com.qiangyu.test.view.CouponDisplayView
  android:orientation="horizontal" android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:background="@color/indicator_color"
  android:padding="20dp">
  <ImageView
   android:layout_width="120dp"
   android:layout_height="match_parent"
   android:src="@drawable/goods_test"
   android:scaleType="centerCrop"/>
  <LinearLayout
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:orientation="vertical"
   android:paddingLeft="16dp">
   <TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="18dp"
    android:text="美食劵"
    />
   <TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="12dp"
    android:padding="5dp"
    android:text="编号:11223124123213131"
    />
   <TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="12dp"
    android:padding="5dp"
    android:text="编号:11223124123213131"
    />
   <TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="12dp"
    android:paddingLeft="5dp"
    android:paddingTop="5dp"
    android:text="截止日期:2001-09-07"
    />
  </LinearLayout>
 </com.qiangyu.test.view.CouponDisplayView>
</FrameLayout>